Large Stroke Single Crystal "Hi-Fi STAKE" Actuator

Large Stroke Single Crystal "Hi-Fi STAKE" Actuator


Key Features


  • Linear (R² > 0.998) and near-hystersis-free (<1.2%) responses.
  • Large stroke (up to 50 µm @ +240V) with moderate working loads (up to 14kg)
  • Used temperature up to 60°C
  • Sub-nanometer resolution, sub-microsecond response
  • Minimum aging problem
  • Low device capacitance (<5 nF to 250 nF); low power consumption under a.c. drive
  • Five different types are available: "Cost-Effective", "Large-Stroke", "High-Load", "High- Temperature" and "Cryogenic" Stakes

    • STAKE Actuator Product Brochure

    For More Enquiries, Contact Us Here.

Product Description

We offer the following 5 types of Hi-Fi Stake Single Crystal Piezoelectric Actuators

  • "Cost-Effective" Hi-Fi Stakes (HFS-CE) - see Table A for more.
  • "Large-Stroke" Hi-Fi Stakes (HFS-LS)- of (upper + lower) 2-level design, see Table B .
  • "High-Load" Hi-Fi Stakes (HFS-HL) - of (inner + outer) 2-layer design, see Table C.
  • "High-Temperature" Hi-Fi Stakes (HFS-HT) - of use temperature up to 80°C. (*currently under development.)
  • "Cryogenic" Hi-Fi Stakes (HFS-CG) (*currently under development.)

    • Below show the operating range of the various displacement Flextensional actuators currently available at MMT.

    Linear Hysteresis Free

    Linear, Hysteresis-Free

    Sub nanometer resolution

    Sub-nanometer resolution



    Under constant load conditions and within the operating load range, the axial displacement (∆L) varies approximately with temperature and the applied voltage via the equation below:

    ∆L = {a + b(T - 20)} VLac

    where ∆L is in µm, T is in °C, V is in volts
    and Lac is in mm. a = 0.0044, b = 1.9x10-5.

    Product Dimensions and Performance Specifications


    Cost-Effective Hi-Fi Stakes (HFS-CE)



    Table A - "Cost-Effective" Hi-Fi Stakes (HFS-CE)

    Product Code Dimensions[1]
    W1 x W2 x L (mm3)    		 Stroke [2]
    @ +240V (µm)    		 Stiffness
    (kg-f/µm)    		 Max. Load Allowed (kg-f)[3]
    25°C 40°C 60°C
     
    HFS-CE-3.6x8L 3.6x3.6x8L -5 0.35 1.8 1.5 0.9
    HFS-CE-3.6x11L 3.6x3.6x11L -8 0.21
    HFS-CE-3.6x15L 3.6x3.6x15L -12 0.14
    HFS-CE-3.6x19L 3.6x3.6x19L -16 0.11
    HFS-CE-3.6x23L 3.6x3.6x23L -20 0.09
    HFS-CE-3.6x28L 3.6x3.6x28L -25 0.07
     
    HFS-CE-5x8L 5x5x8L -5 0.52 3.0 2.5 1.5
    HFS-CE-5x11L 5x5x11L -8 0.32
    HFS-CE-5x15L 5x5x15L -12 0.22
    HFS-CE-5x19L 5x5x19L -16 0.16
    HFS-CE-5x23L 5x5x23L -20 0.13
    HFS-CE-5x28L 5x5x28L -25 0.10
     
    HFS-CE-7.5x8L 7.5x7.5x8L -5 0.83 4.8 4.0 2.4
    HFS-CE-7.5x11L 7.5x7.5x11L -8 0.51
    HFS-CE-7.5x15L 7.5x7.5x15L -12 0.35
    HFS-CE-7.5x19L 7.5x7.5x19L -16 0.26
    HFS-CE-7.5x23L 7.5x7.5x23L -20 0.21
    HFS-CE-7.5x28L 7.5x7.5x28L -25 0.16
     
    HFS-CE-10x8L 10x10x8L -5 1.14 7.5 6.0 3.7
    HFS-CE-10x11L 10x10x11L -8 0.7
    HFS-CE-10x15L 10x10x15L -12 0.48
    HFS-CE-10x19L 10x10x19L -16 0.35
    HFS-CE-10x23L 10x10x23L -20 0.29
    HFS-CE-10x28L 10x10x28L -25 0.22
    [1] Active length (LAC) = L-3 mm.
    [2] The actuator contracts under positive-polarity applied voltage. Negative-polarity applied voltage under +240V bias drive is recommened for extensional axial displacement.
    [3] Unlike PZT stacks, STAKE actuators contract under positive-polarity applied voltage. The usual definition and determination of Blocking Force is thus not applicable here. The extent of linear, non-hysteretic response of STACK actuators is determined by the phase transformation properties of thecomponent single crystals. The displacement response is linear with no occurrence of rhombohedral-to-orthorhombic phase transformation of the component single crystals at stipulated operating temperatures and loads.

    Large-Stroke Hi-Fi Stakes (HFS-LS)



    Table B - "Large-Stroke" Hi-Fi Stakes (HFS-LS)

    Product Code Dimensions[1]
    W1 x W2 x L (mm3)    		 Stroke [2]
    @ +240V (µm)    		 Stiffness
    (kg-f/µm)    		 Max. Load Allowed (kg-f)[3]
    25°C 40°C 60°C
     
    HFS-LS-5x32L 5x5x32L -28 0.093 3.0 2.5 1.5
    HFS-LS-5x36L 5x5x36L -32 0.081
    HFS-LS-5x41L 5x5x41L -37 0.070
    HFS-LS-5x45L 5x5x45L -41 0.063
    HFS-LS-5x49L 5x5x49L -45 0.058
    HFS-LS-5x54L 5x5x54L -50 0.052
     
    HFS-LS-7.5x32L 7.5x7.5x32L -28 0.15 4.8 4 2.4
    HFS-LS-7.5x36L 7.5x7.5x36L -32 0.13
    HFS-LS-7.5x41L 7.5x7.5x41L -37 0.11
    HFS-LS-7.5x45L 7.5x7.5x45L -41 0.1
    HFS-LS-7.5x49L 7.5x7.5x49L -45 0.09
    HFS-LS-7.5x54L 7.5x7.5x54L -50 0.08
     
    HFS-LS-10x32L 10x10x32L -28 0.20 7.5 6 3.7
    HFS-LS-10x36L 10x10x36L -32 0.18
    HFS-LS-10x41L 10x10x41L -37 0.15
    HFS-LS-10x45L 10x10x45L -41 0.14
    HFS-LS-10x49L 10x10x49L -45 0.13
    HFS-LS-10x53L 10x10x54L -50 0.11
    [1] Active length (LAC) = L-4 mm; [2] & [3] See footnotes of Table A

    High-Load Hi-Fi Stakes (HFS-HL)



    Table C - "High-Load" Hi-Fi Stakes (HFS-HL)

    Product Code Dimensions[1]
    W1 x W2 x L (mm3)    		 Stroke [2]
    @ +240V (µm)    		 Stiffness
    (kg-f/µm)    		 Max. Load Allowed (kg-f)[3]
    25°C 40°C 60°C
     
    HFS-HL-7.5x8L 7.5x7.5x8L -5 1.56 8.5 7.5 4.5
    HFS-HL-7.5x11L 7.5x7.5x11L -8 0.96
    HFS-HL-7.5x15L 7.5x7.5x15L -12 0.66
    HFS-HL-7.5x19L 7.5x7.5x19L -16 0.49
    HFS-HL-7.5x23L 7.5x7.5x23L -20 0.39
    HFS-HL-7.5x28L 7.5x7.5x28L -25 0.30
     
    HFS-HL-10x8L 10x10x8L -5 2.18 14.0 11.0 7
    HFS-HL-10x11L 10x10x11L -8 1.34
    HFS-HL-10x15L 10x10x15L -12 0.92
    HFS-HL-10x19L 10x10x19L -16 0.67
    HFS-HL-10x23L 10x10x23L -20 0.56
    HFS-HL-10x28L 10x10x28L -25 0.42
    [1] Active length (LAC) = L-3 mm; [2] & [3] See footnotes of Table A


    * Mircofine reserves the right to change specifications without notice.

    Also Available are:

    * "High-Temperature" Hi-Fi Stakes (HFS-HT) - of use temperature up to 80°C.
    * "Cryogenic" Hi-Fi Stakes (HFS-CG)
    * Customized specifications

    Enquires are welcome!